Intertrochanteric fractures – Evans classification

Classification

Type I: Fracture line extends upwards and outwards from the lesser trochanter (stable). Type I fractures can be further subdivided as:

• Type Ia: Undisplaced two-fragment fracture
• Type Ib: Displaced two-fragment fracture
• Type Ic: Three-fragment fracture without posterolateral support, owing to displacement of greater trochanter fragment
• Type Id: Three-fragment fracture without medial support, owing to displaced lesser trochanter or femoral arch fragment
• Type Ie: Four-fragment fracture without postero-lateral and medial support (combination of Type III and Type IV)

Type II: Fracture line extends downwards and outwards from the lesser trochanter (reversed obliquity/unstable). These fractures are unstable and have a tendency to drift medially.

Explanation

Provide an explanation for key principles and pertinent aspects of the classification

Figures

Reference(s)

Provide the citation for the landmark article and recent review articles describing the classification

Attachments:

Evans_Classification.jpg (image/jpeg)